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Motorola MTX Series Service Manual
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Motorola MTX Series Service Manual

Motorola MTX Series Service Manual

Handie-talkie portable radios
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HT 1000, MT 2000, MTS 2000,
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Summary of Contents for Motorola MTX Series

  • Page 1 HT 1000, MT 2000, MTS 2000, and MTX Series Handie- T alkie ® Portable Radios Service Section...

  • Page 2: Table Of Contents

    Safe Handling of CMOS Devices ........................23 Repair Procedures and Techniques .........................23 , Motorola, Handie-Talkie, JT 1000, HT 1000, MT 2000, MTS 2000, MTX 838, MTX 8000, and MTX 9000 are trademarks of Motorola, Inc. © 1994 by Motorola, Inc., Radio Products Group Service Section 8000 W.
  • Page 3 CONTENTS (cont.) TITLE PAGE NUD7070A, NUD7070B, NUD7085A, AND NUD7085B VHF TRANSCEIVER BOARDS’ COMPONENT LOCATION DIAGRAMS AND SCHEMATIC DIAGRAM ................29 NUD7070A, NUD7070B, NUD7085A, AND NUD7085B VHF TRANSCEIVER BOARDS’ PARTS LIST, AND NUE7213A, NUE7213B, NUE7231B, NUE7240A, AND NUE7240A UHF (403-470MHz) TRANSCEIVER BOARDS’ COMPONENT LOCATION DIAGRAMS .................30 NUE7213A, NUE7213B, NUE7231A, NUE7231B, NUE7240A, AND NUE7240B UHF (403-470MHz) TRANSCEIVER BOARDS’...
  • Page 4 Test Environments, HT 1000 Radios .......................5 40-6 Test Frequencies, HT 1000 Radios ......................6 40-7 Test Environments, MT 2000, MTS 2000, and MTX Series Radios ............7 40-8 Test Frequencies, MT 2000, MTS 2000, and MTX Series Radios ............7 40-9 Receiver Performance Checks ........................8 40-10 Transmitter Performance Checks ......................9...

  • Page 5: Model Numbering System

    MODEL NUMBERING SYSTEM Typical Model Number: Position: 12 13 Position 1 - Type of Unit Positions 13 - 16 “SP” Model Suffix H = Hand-Held Portable Position 12 - Unique Model Variations Positions 2 & 3 - Model Series C = Cenelec N = Standard Package Position 4 - Frequency Band Position 11 - Version...

  • Page 6: List Of Models

    LIST OF MODELS CONVENTIONAL SYSTEMS RADIOS HT 1000 Model Family H01KDC9AA1BN 2-Freq., 5- to 1-Watt, 136 - 178 MHz H01KDC9AA3BN 16-Freq., 5- to 1-Watt, 136 - 178 MHz H01RDC9AA1BN 2-Freq., 4- to 1-Watt, 403 - 470 MHz H01RDC9AA3BN 16-Freq., 4- to 1-Watt, 403 - 470 MHz H01SDC9AA1BN 2-Freq., 4- to 1-Watt, 450 - 520 MHz H01SDC9AA3BN...

  • Page 7: List Of Antennas And Batteries

    LIST OF MODELS (cont.) SHARED SYSTEMS RADIOS MTX 838 Model Family H01KDC9DB3AN 16-Mode, 5- to 1-Watt, 136 - 178 MHz H01KDD9DB4AN 99-Mode, 6-Character Top Display, 5- to 1-Watt, 136 - 178 MHz H01KDF9DB5AN 160-Mode, 14-Character Front Display, Limited Keypad, 5- to 1-Watt, 136 - 178 MHz H01KDH9DB7AN 160-Mode, 4-Character Front Display, Full Keypad, 5- to 1-Watt, 136 - 178 MHz H01RDC9DB3AN...

  • Page 8: Maintenance Specifications For Vhf Radios

    MAINTENANCE SPECIFICATIONS FOR VHF RADIOS (All Specifications Are Per Electronic Industries Association (EIA) 316B Unless Otherwise Noted.) GENERAL RECEIVER TRANSMITTER FCC Designation: AZ489FT3768 RF Power: Frequency Range: 136–178MHz 136-174MHz 1-5 Watts Power Supply: Nickel-Cadmium Battery Bandwidth: 42MHz 174-178MHz 1-4 Watts Battery Voltage: Nominal: 7.5 Volts...

  • Page 9: Maintenance Specifications For 800Mhz Radios

    MAINTENANCE SPECIFICATIONS FOR 800MHz RADIOS (All Specifications Are Per Electronic Industries Association (EIA) 316B Unless Otherwise Noted.) GENERAL RECEIVER TRANSMITTER RF Power: 3 Watts FCC Designation: AZ489FT5747 Frequency Range: 851–870MHz Power Supply: Nickel-Cadmium Battery Bandwidth: 19MHz Frequency Range: 806–824MHz Battery Voltage: Nominal: 7.5 Volts 851–869MHz...

  • Page 10: Section I. Introduction

    SECTION I. INTRODUCTION This manual includes a model chart, specifications, WARNING fundamental disassembly/reassembly procedures; and all schematic diagrams, printed circuit board details, flex This is an operational procedure, practice, or condi- circuit diagrams, and several parts lists to completely tion, etc., which may result in injury or death if not cover the HT 1000, MT 2000, MTS 2000, and MTX carefully observed.

  • Page 11: Recommended And Required Test Equipment, Service Aids, And Tools Lists

    The "CHARACTERIS- This MAV-PACK is strongly recommended for tech- TICS" column is included so that equivalent equipment nicians who intend to service this and other Motorola may be substituted; however, when no information is radios using leadless components. This VHS videotape provided in this column, the specific Motorola model list- is in standard half-inch format.
  • Page 12 Includes operation, disassembly, and basic troubleshooting. Radio Introduction RLN-4201 Battery Tester Tests battery charge. RLN-4048 Battery Tester Adapter Adapts HT 1000, MT 2000, MTS 2000, and MTX Series radio batteries to the RLN-4201 Battery Tester. RTL-4208 RF Probe 50-ohm, high-frequency probe. RT-5144/48/0 Test Probe (black) Needle-fine test probes for high-density circuitry.

  • Page 13: Recommended Service Tools

    “heat focus head” for each of the compo- available from Motorola. Note that the R-1319A nents on which this item is used. Each of these heat solder/desolder workstation requires the use of some focus heads must be ordered separately.

  • Page 14: Section Iii. Transceiver Performance Testing

    (c) Each additional press of SB3 will advance to the next test channel. (refer to Table 40-6), and The HT 1000, MT 2000, MTS 2000, and MTX series a corresponding set of tones will indicate the radios have been prepared to meet published specifica- channel.

  • Page 15: Test Frequencies, Ht 1000 Radios

    Series Radios (a) Turn radio on When the MT 2000, MTS 2000, or MTX series radio (b) After the self test is complete, press the monitor is operating in its normal environment, the radio's button (side button 3, SB3) five times in succes- microcomputer controls the RF channel selection, sion, within 10 seconds.

  • Page 16: Test Environments, Mt 2000, Mts 2000, And Mtx Series Radios

    To exit test mode, turn the radio off then back on. • Press 6, view “54/1”; release, view “54/0” • Press 7, view “55/1”; release, view “55/0” Table 40-7. Test Environments, MT 2000, MTS 2000, and MTX Series Radios NO. OF BEEPS DISPLAY DESCRIPTION FUNCTION...

  • Page 17: Receiver Performance Checks

    Table 40-9. Receiver Performance Checks TEST COMMUNICATIONS NAME ANALYZER RADIO TEST SET COMMENTS Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be ±150Hz 4th channel test frequency ◊ Frequency 4 CSQ (during the Monitor: Frequency error output at performance check) Input at RF In/Out...

  • Page 18: Transmitter Performance Checks

    Table 40-10. Transmitter Performance Checks TEST COMMUNICATIONS NAME ANALYZER RADIO TEST SET COMMENTS Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be < 150Hz. ◊ Frequency 4th channel test frequency 4 CSQ (during the Monitor: Frequency error performance check).

  • Page 19: Error Code Displays

    IV. ERROR CODE DISPLAYS A. Power-up Display Codes B. Operational Display Codes At power-up, the radio performs cursory tests to During operation, the radio performs dynamic tests determine if its basic electronics and software are in to determine if it is working properly. Problems detected working order.

  • Page 20: Section V. Radio Alignment Procedure

    SECTION V. RADIO ALIGNMENT PROCEDURE A. General procedures for the software. To perform the alignment procedures, the radio must be connected to the PC, RIB An IBM PC (personal computer) and RSS (Radio (radio interface box), and Universal Test Set as shown Service Software) are required to align the radio.
  • Page 21 Service Menu Signalling Transmitter Receiver Alignment Alignment Alignment Menu Menu Menu F2 - Reference Oscillator F2 - Front End (VHF/UHF) F2 - DTMF F3 - Tx Power F3 - Rated Audio F3 - Trunking F4 - Tx Dev Balance F4 - Squelch (25/30 kHz) F4 - MDC 1200 F5 - Tx Dev Limit F5 - Squelch (20 kHz)

  • Page 22: Reference Oscillator Alignment

    Perform the following procedures in the 8. Press F10 and F2 to return to the RECEIVER sequence indicated. menu. B. Reference Oscillator Alignment D. Rated Audio Adjustment of the reference oscillator is critical for 1. Set test box (RTX-4005B) meter selection switch to proper radio operation.

  • Page 23: Transmitter Power

    6. Press F10, F2, then F10 again to return to the ser- 1. Press F4 to select the TRANSMIT DEVIATION vice menu. BALANCE softpot. The screen will indicate the transmit test frequencies to be used. F. Transmitter Power 2. Begin with the lowest test frequency shown on the VHF and UHF radios require two power-level screen.

  • Page 24: Transmit Deviation Limit Reference

    3. With the meter selector switch (RTX4005B) set to TX VCO Crossover MIC, inject a 1 kHz tone on the AUDIO IN terminal 1. From the SERVICE menu, press F2 to select on the test set, 80mVrms as measured on the TRANSMITTER alignment.
  • Page 25 Trunking High Speed Signalling MDC 1200 1. From the SERVICE menu, press F4 to select SIG- 1. From the SERVICE menu, press F4 to select SIG- NALLING alignment. NALLING alignment. 2. Press F3 to select the TRUNKING HIGH SPEED 2. Press F4 to select the MDC softpot. softpot.

  • Page 26: Section Vi. Disassembly And Reassembly

    3. Wear a conductive wrist strap in series with a 100k resistor to ground. Replacement wrist straps that con- nect to the bench top covering are Motorola part number RSX-4015. 4. Do not wear nylon clothing while handling CMOS devices.
  • Page 27 5. Separate the front cover assembly from the internal c. Lay the chassis down, and rotate the front electronics (chassis) (see Figure 40-5). cover back and partially away from the chassis 3/4/92 (see Figure 40-6). LETTERI REQUIR Small Flat Blade Screwdriver Chassis Front Cover...

  • Page 28: Disassembly Of Control Top

    a. Use a small, thin, flat-blade screwdriver (or like 10. Carefully remove the RF board and the controller instrument) to help raise the sliding portion of board from the chassis. the connector approximately 1/8 of an inch from NOTE its seated position. A slight prying action, alter- The RF board and the controller board are connected nating back and forth on the top corners of the together with a jumper flex.

  • Page 29: Disassembly Of Front Cover Assembly

    c. The cover will pop loose from the switch (1) Insert a small, flat-blade screwdriver under housing. the base of the bracket leg near the ring. 3. Push the three switches and the LED out of the (2) Lift the bracket leg until it pops loose from switch housing.

  • Page 30: Reassembly

    Near the three larger slots on the other side of the PA heatsink block (top surface) is coated with a the board, use finger pressure to push and thin film of thermal compound (Motorola part press that side of the board down until it snaps number 1110022A55).
  • Page 31 Plating Reliefs Misaligned MAEPF-22579-A Figure 40-14. Contoured O-ring/ Antenna Bushing Seal MAEPF-22580-O MAEPF-22580-O Figure 40-15. d. Reinstall the rubber controls top seal on the front cover assembly. Check to ensure that the orange emergency button seal slides into posi- control top. tion freely.

  • Page 32: Section Vii. Maintenance

    B. Preventive Maintenance with the liquid. Do not use high-pressure air to The HT 1000, MT 2000, MTS 2000, and MTX series hasten the drying process, since this could radios do not require a scheduled preventive mainte- cause the liquid to puddle and collect in unwant- nance program;...
  • Page 33 This family of radios uses bonded, multi-layer, On the latest version HT 1000, MT 2000, printed circuit boards. Since the inner layers are MTS 2000, and MTX series radios, a strip con- not accessible, some special considerations are nector, two female connectors and a strain relief...
  • Page 34 Chip Components 3 Solder Tabs Use either the RLN-4062 Hot-Air Repair Station or the Motorola 0180381B45 Repair Station for chip component replacement. When using the 0180381B45 Repair Station, select the TJ-65 mini-thermojet hand piece. On either unit, adjust the temperature control to 700 degrees F. (370 Figure 40-16.
  • Page 35 60 seconds. If the (with moisture-indicator card) as supplied by OMPAC lifts from the circuit board the Motorola Parts Department. Once the earlier than 60 seconds: sealed bag is opened and/or the OMPAC • check the temperature control set-...
  • Page 36 Thin Small Outline Package (TSOP) focus head until it is approximately 1/8”-1/4” Components (0.3cm-0.6cm) above the shield. Turn on the heater and wait until the shield lifts off the circuit Removing and replacing a TSOP component board. Once the shield is off, turn off the heat, will be done with the R-1319, using the same grab the part with a pair of tweezers, and turn procedure used to remove and replace an...
  • Page 37 (215 degrees C) 445 degrees F (230 solder pad on the circuit board to ensure degrees C) maximum. Apply solder paste alignment of the new RF PA. Prepare the to the exposed solder pads under the PA. sight by using solder wick and a soldering Place the circuit board in the circuit board iron to remove all solder from the solder holder, and position the RF PA under the...

  • Page 38: Nud7070A, Nud7070B, Nud7085A, And Nud7085B Vhf Transceiver Boards' Component Location Diagrams And Schematic Diagram

    INSERT DIAGRAMS DC VOLTAGES ARE MEASURED FROM POINT (L1) BEPF-24631-O (20% BLK, 133 LINE) INDICATED TO CHASSIS GROUND USING A MOTOROLA DC MULTIMETER OR EQUIVALENT. (OL) BEPF-24632-O (100% BLK.) TRANSMITTER MEASUREMENTS SHOULD BE MADE R.T. 50% WITH A 1.2 uF CHOKE IN SERIES WITH THE VOLTAGE PROBE TO PREVENT CIRCUIT LOADING.

  • Page 39: Transceiver Boards' Component Location Diagrams

    JACK: 0662057A63 3.9k C162 2113741F13 J301 - - - - - - - - - Circuit plating on NUD7070A 0662057B05 200k REFERENCE MOTOROLA C163 2113740F44 and NUD7085A; 20 contacts; 0662057A53 1.5k SYMBOL PART NO. DESCRIPTION C164 2113740F51 to P301 on Jumper Flex...

  • Page 40: Nue7213A, Nue7213B, Nue7231A, Nue7231B, Nue7240A, And Nue7240B Uhf (403-470Mhz) Transceiver Boards' Schematic Diagram

    INSERT SCHEMATIC 63D81200C32-O (100% BLK.) (OL) DEPF-24640-O (100% RED) SHOOT AT 100% NUE7213A, NUE7213B, NUE7231A, NUE7231B, NUE7240A, AND NUE7240B UHF (403-470MHz) TRANSCEIVER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 41: Nue7213A, Nue7213B, Nue7231A, Nue7231B, Nue7240A, And Nue7240B Uhf (403-470Mhz)

    NUE7240A, NUE7240B TPLF-4112-B C140 2113741F41 .0047µF NUE7231A, and NUE7240A; 0662057A45 20 contacts; to P301 on C141, 145, 147 2113740F51 0662057B47 REFERENCE MOTOROLA C148 2113740F07 1.5 ± 0.25pF Jumper Flex 0662057A89 or 0905461X01 Connector on NUE7213B, SYMBOL PART NO. DESCRIPTION C149, 150...

  • Page 42: Nue7214A, Nue7214B, Nue7232A, Nue7232B, Nue7241A, And Nue7241B Uhf (450-520Mhz) Transceiver Boards' Schematic Diagram

    J301 - - - - - - - - - Circuit plating on NUE7214A, NUE7232A, and NUE7241A; C148 2113740F03 1.0 ± 0.1pF 0662057A89 REFERENCE MOTOROLA C149 2113740F30 20 contacts; to P301 on 0662057A09 SYMBOL PART NO. DESCRIPTION Jumper Flex C150...

  • Page 43: Nue7214A, Nue7214B, Nue7232A, Nue7232B, Nue7241A, And Nue7241B Uhf (450-520Mhz)

    INSERT SCHEMATIC DIAGRAM 63D81200C33-O (100% BLK.) (OL) DEPF-24645-O (100% RED) R.T. 94% NUE7214A, NUE7214B, NUE7232A, NUE7232B, NUE7241A, AND NUE7241B UHF (450-520 MHz) TRANSCEIVER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 44: Nuf6394A, Nuf6394B, Nuf6410A, Nuf6410B, Nuf6423A, And Nuf6423B 800Mhz Transceiver Boards' Schematic Diagram

    INSERT SCHEMATIC 63D81200C34-O (100% BLK.) (OL) DEPF-24650-O (100% RED) SHOOT AT 86% NUF6394A, NUF6394B, NUF6410A, NUF6410B, NUF6423A, AND NUF6423B 800MHz TRANSCEIVER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 45: Component Location Diagrams

    INSERT SCHEMATIC 63D81200C38-O (100% BLK.) (OL) DEPF-24655-O (100% RED) R.T. 81% NUF6395B, NUF6395C, NUF6424A, AND NUF6424B 900MHz TRANSCEIVER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 46: Nuf6395B, Nuf6395C, Nuf6424A, And Nuf6424B 900Mhz Transceiver Boards' Schematic Diagram

    C202 2113740F34 Q101 4805128M27 NUF6423A, NUF6423B TPLF-4080-C C204 2113740F39 Q108 4805921T06 Dual PNP C205 2113740F14 Q110 4805218N45 REFERENCE MOTOROLA C209 2113743E07 .022µF C211 2113740F14 SYMBOL DESCRIPTION PART NO. RESISTOR, Fixed:Ω ± 5% C214 2113743E07 .022µF .0625W unless stated C219 2113743E07 .022µF...

  • Page 47: Nuf6395B, Nuf6395C, Nuf6424A, And Nuf6424B 900Mhz Transceiver Boards' Parts List, And Ntn7089A/Ntn7092A Controller Boards' (Jt 1000/Ht 1000 Models Only) Component Location Diagrams

    C205 - - - - - - - - - Not Placed NUF6424A, NUF6424B 4805218N63 TPLF-4081-D C209 2113743E07 .022µF Q101 4805128M27 C211 2113740F14 REFERENCE MOTOROLA Q108 4805921T06 Dual PNP C214 2113743E07 .022µF Q110 4805218N45 SYMBOL DESCRIPTION PART NO. C219 2113743E07 .022µF...

  • Page 48: Ntn7089A/Ntn7092A Controller Boards' (Jt 1000/Ht 1000 Models Only) Schematic Diagram

    INSERT SCHEMATIC 63D81200C42-A (100% BLK.) (OL) DEPF-24495-A (100% RED) SHOOT AT 100% NTN7089A/NTN7092A CONTROLLER BOARDS’ (JT 1000 /HT 1000 MODELS ONLY) SCHEMATIC DIAGRAM...

  • Page 49: And Ntn7091A/Ntn7093A Controller Boards' Component Location Diagrams

    Miscellaneous TPLF- 4078-C R701 0662057A56 NTN7092A, Controller (HT 1000 Models Only) R702, 703 0662057A41 R704 0662057A65 4.7k REFERENCE MOTOROLA REFERENCE MOTOROLA R705 thru 707 - - - - - - - - Not Placed SYMBOL PART NO. DESCRIPTION R708 0662056G13 100k ±...

  • Page 50: Ntn7091A/Ntn7093A Controller Boards' Schematic Diagram

    INSERT SCHEMATIC 63D81200C43-O (100% BLK.) SHOOT AT 87% NTN7091A/NTN7093A CONTROLLER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 51: Universal (Accessory) Connector Pin Numbers And Signal Assignments, And

    ? @ @ @ @ @ U ? e @ ? h @ ? f ? @ e @ @ @ @ @ U e @ ? f ? @ e @ ? f @ ? ? @ e V / X @ ? @ f ? @ REFERENCE MOTOROLA @ ? g @ ? h @ ?

  • Page 52: Ntn7620B Controller Board Schematic Diagram

    INSERT SCHEMATIC 63D81200C44-O (100% BLK.) SHOOT AT 100% NTN7620B CONTROLLER BOARD SCHEMATIC DIAGRAM...

  • Page 53: Ntn7620B Controller Board Parts List, And Ntn7512A, Ntn7513A, Ntn7857A, And Ntn7858A Controller Boards' Component Location Diagrams

    5105662U54 SCRAM or 0905461X01 Connector on later version U715, 716 5105329V30 256 x 8 FLASH REFERENCE MOTOROLA radios, 20 contacts; to P704 U717 - - - - - - - - - Not Placed SYMBOL PART NO. DESCRIPTION Strip Connector...

  • Page 54: Ntn7512A, Ntn7513A, Ntn7857A, And Ntn7858A Controller Boards' Schematic Diagram

    INSERT SCHEMATIC 63D81200C41-A (100% BLK.) SHOOT AT 100% NTN7512A, NTN7513A, NTN7857A, AND NTN7858A CONTROLLER BOARDS’ SCHEMATIC DIAGRAM...

  • Page 55: Ntn7512A, Ntn7513A, Ntn7857A, And Ntn7858A Controller Boards' Parts List, Basic Radio Exploded View Diagram, Top-Display Exploded View Diagram, And Parts List

    LABEL, Agency Approval; not field R728, 729 0662057A89 C759, 760, 761 2113741F17 replaceable See Note 1 CONNECTOR,Strip (P301/P704) 3305183R55 LABEL, Motorola 3205820V02 SEAL, Connector Plug R730, 731 0662057C55 or 8405247V02 FLEX, Jumper (early version radios) 3305183R70 LABEL, MT2000 - - - - - - - - - LABEL, Rear;...

  • Page 56: Keypad Radio Exploded View Diagram And Parts List

    7505870U02 KEYPAD, 6-key See Note 1 CONNECTOR, Strip (P301/P704) 5105238U83 MODULE, Display or 8405247V01 FLEX, Jumper (early version radios) 3305183R55 LABEL, Motorola See Note 2 PLUG, Connector (P404) 3305183R70 LABEL, MT2000 3205820V02 SEAL, Connector Plug or 3305183R71 LABEL, MTS2000 - - - - - - - - - LABEL, Rear;...

  • Page 57: Integrated Circuits With Pin-Out Names

    U101 U204 VMULT 4 VMULT 3 C BIAS VMULT 2 CATH 1 ADAPT_SW V CON VMULT 1 57W98 X IADAPT FREFOUT IOUT TXI1 TXI1 TXI1 WLYWW MODOUT INT CAP OUT 35U52 X A/D BYPASS CPBIAS 1 ANODE 2 XTAL 1 WLYWW CPBIAS 2 XTAL 2...
  • Page 58 OPEN CONTROLLER U705 OPEN CONTROLLER U710 RXDIN DECIN OVERRIDE 35U47 X IRQB HC11RST XIRQ WLYWW SLIC IV P3 SCNEN RESET VDD3 VSS1 57W06 0 VSS3 VDD1 TXPG028NP06 RTSBOUT SCNSLB SCIRXD RTSBIN A14IN MAEPF-24674-O MAEPF-24674-O MAEPF-24672-O MAEPF-24672-A CLOSED CONTROLLER U705 U713 I/O 7 32KX8EE 62U58 O...
  • Page 59 NOTES...

  • Page 60: Appendix

    Secure Module as long as the radio bat- tery is in place. The Secure Module is designed to digitally encrypt and decrypt voice data in Motorola’s MTS 2000 Series Key variables are loaded into the Secure Module Handie-Talkie™ Portable Radios. The Secure Module through connector P1 pins 13, 15, and 16.
  • Page 61 Table 1. MTS 2000 Single Key Secure Module I/O Definition SIGNAL NAME CONNECTOR PLUG FUNCTION P1 PIN NUMBER UNSW B+ Unswitched battery voltage Switched 5 volt supply REF CLK 2.1/2.4 MHz clock signal GROUND Ground PRE EMPHMIC AUDIO Transmit Clear Audio RX AUDIO Receive Clear Audio DISCRIMINATOR...
  • Page 62 B. Keyloading Problems IV. SERVICE AID A cable, Motorola kit number TDN9390A, Use the following procedure to troubleshoot key- connects the MTS 2000 radio universal connector to loading problems: the keyloader. 1. Verify that the correct Key Variable Loader (KVL) is being used for the particular encryption algo- rithm present in the radio.
  • Page 63 brief description for each parameter. Refer to the selectable option is Proper Code Detect. This can RSS manual for general instructions in the use of be found by going to the MORE OPTIONS screen RSS. (F9) from the screen that was used to select secure/clear Strapping for trunking channels.
  • Page 64 C. Secure TX Deviation 6. Press F6 to dekey the radio. Press F8 to program the softpot value. Transmit deviation balance compensation and transmit deviation limit adjustments should be complet- 7. Press F10 to return to the TRANSMITTER menu. ed before secure deviation is adjusted. Remember to D.
  • Page 65 Table 3. RSS Secure Parameters Possible Radio Wide/ Used in Parameter Default Settings Per Channel Conv/Trunk Description Secure Yes/No Radio Wide Both Notifies radio that Secure Equipped Module is present XL IC Present Yes/No Radio Wide Both Notifies radio that Secure Module contains XL IC Secure/Clear Select...
  • Page 66 *6881200C40* Motorola 8000 West Sunrise Boulevard Fort Lauderdale, Florida 33322 68P81200C40-O...

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